'''
Created on Jul 16, 2012

@author: nzhao
'''
import numpy as np

from traits.api import HasTraits, Int

class AbstractSpinSystem(HasTraits):
    """
    doc for AbstractSpinSystem here.
    """
    nspin = Int()
    
    def __init__(self, n = 0):
        """
        initialization of AbstractSpinSystem.
        """
        self.nspin = n